Configuration Example

The following steps show a partial configuration using the topology in Figure 61:

On LSR 5, create a bypass tunnel to protect the link between LSR 5 and LSR 6. If you configure path options, you can specify the explicit path for the bypass tunnel either statically or to be dynamically calculated by the IGP traffic engineering mechanism.host1(config)#interface tunnel mpls:bypass56 host1(config-if)#tunnel mpls path-option 1 explicit name bypass host1(config-if)#tunnel destination 172.20.1.1 host1(config-if)#exit
On LSR 5, enable the explicit path, if configured.host1(config)#mpls explicit-path name bypass enable host1(config-expl-path)#next-address 10.10.9.2 host1(config-expl-path)#exit
On LSR 5, assign the bypass tunnel to the interface being protected.host1(config)#interface atm 4/0.1 host1(config-if)#mpls backup-path bypass56
On LER 1 (the tunnel ingress), specify that local protection is required for the primary tunnel.host1(config)#interface tunnel mpls:primary1 host1(config-if)#tunnel mpls fast-reroute